Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a fragmentary enlarged front view showing the details of the tread portion thereof;

FIG. 8 is a section view taken along line 8-8 in FIG. 7; and,

FIG. 9 is a section view taken along line 9-9 in FIG. 7.

The broken lines are for the purpose of showing environmental structure only and form no part of the claimed design. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 